公开(公告)号：US20220158167A1

公开(公告)日：2022-05-19

申请号：US17097483

申请日：2020-11-13

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Hongliang WANG ,  Gayatri V. DADHEECH ,  Mei CAI

IPC: H01M4/133 ,  H01M4/1393 ,  H01M4/587 ,  H01M4/36 ,  H01M4/66 ,  H01M10/0525 ,  H01M4/62

Abstract: An electrode for an electrochemical cell is provided. The electrode includes a carbon membrane having a first face and an opposing second face, wherein at least a portion of the carbon membrane is modified to include an elevated number of nucleation sites for lithium relative to the carbon membrane when unmodified.

公开(公告)号：US20210218015A1

公开(公告)日：2021-07-15

申请号：US16743650

申请日：2020-01-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Shuru CHEN ,  Fang DAI ,  Mei CAI

IPC: H01M4/139 ,  H01M10/0525 ,  H01M4/04 ,  H01M4/38 ,  H01M4/62

Abstract: The present disclosure relates to sulfur-containing electrodes and methods for forming the same. For example, the method may include disposing an electroactive material on or near a current collector to form an electroactive material layer having a first porosity and applying pressure and heat to the electroactive material layer so that the electroactive material layer has a second porosity. The first porosity is greater than the second porosity. The electroactive material may include a plurality of electroactive material particles and one or more salt additives. The method may further include contacting the electroactive material layer and an electrolyte such that the electrolyte dissolves the plurality of one or more salt particles so that the electroactive material layer has a third porosity. The third porosity may be greater than the second porosity and less than the first porosity.

公开(公告)号：US20210020912A1

公开(公告)日：2021-01-21

申请号：US16514633

申请日：2019-07-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Jin LIU ,  Mei CAI ,  Meinan HE ,  Hongliang WANG

IPC: H01M4/1391 ,  H01M10/0525 ,  H01M10/0567 ,  H01M4/62 ,  H01M4/36 ,  H01M4/134 ,  H01M4/1395 ,  H01M4/04

Abstract: A negative electrode according to various aspects of the present disclosure includes a negative electroactive material and a layer. The negative electroactive material includes a lithium-aluminum alloy. The layer is disposed directly on at least a portion of the negative electroactive material and coupled to the negative electroactive material. The layer includes anodic aluminum oxide and has a plurality of pores. The present disclosure also provides an electrochemical cell including the negative electrode. In certain aspects, the negative electroactive material is electrically conductive and functions as a negative electrode current collector such that the electrochemical cell is free of a distinct negative electrode current collector component. In certain aspects, the layer is ionically conductive and electrically insulating and functions as a separator such that the electrochemical cell is free of a distinct separator component. In various aspects, the present disclosure also provides a method of making the negative electrode.

公开(公告)号：US20230287153A1

公开(公告)日：2023-09-14

申请号：US17690831

申请日：2022-03-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Robert D. SCHMIDT ,  Shuru CHEN ,  Fang DAI ,  Mei CAI

IPC: C08F8/36 ,  C08F120/44

CPC classification number: C08F8/36 ,  C08F120/44 ,  H01M10/0565

Abstract: Methods for forming sulfur polyacrylonitrile are provide. In certain variations, the method includes contacting sulfur and polyacrylonitrile to form an admixture, sealing a container holding the admixture, heating the admixture to a first temperature venting the container holding the admixture to release gases generated during the heating of the admixture to the first temperature, re-sealing the container holding the admixture, and heating the admixture to a second temperature. In other variations, the method includes contacting sulfur and polyacrylonitrile to form an admixture, heating the admixture to a first temperature, sealing a container holding the admixture, and heating the admixture to a second temperature. The second temperature is greater than the first temperature.

公开(公告)号：US20230246295A1

公开(公告)日：2023-08-03

申请号：US17588707

申请日：2022-01-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Yifan ZHAO ,  Biqiong WANG ,  Shuru CHEN ,  Mei CAI

IPC: H01M50/434 ,  H01M50/449

CPC classification number: H01M50/434 ,  H01M50/449

Abstract: The present disclosure provides a coated separator including a porous separator and a ceramic coating disposed on one or more surfaces thereof. The ceramic coating includes a ceramic material and an additive selected from the group consisting of: lithium nitrate (LiNO3), lithium phosphate (LiPO3), lithium orthophosphate (Li3PO4), lithium difluoro (oxalate) borate (LiDBoB), cyclic sulfone, polysulfide, lithium halide salts, and combinations thereof. In certain variations, the coated separator is prepared by contacting the porous separator with a slurry including the ceramic material and the additive. In other variations, the coated separator is prepared by forming a ceramic coating on one or more surfaces of a porous separator and contacting the porous separator with the additive, for example by immersing, or alternatively, a spraying process.

公开(公告)号：US20230087017A1

公开(公告)日：2023-03-23

申请号：US17480085

申请日：2021-09-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Mei CAI ,  Wei ZENG ,  Aijie CHEN

IPC: H01M10/658 ,  H01M50/293

Abstract: A thermal barrier component for an electrochemical cell (e.g., a battery) includes a mat, a functional material, and a polymer binder. The mat includes a porous matrix. The functional material is in pores of the porous matrix. The functional material includes an oxide. In certain aspects, the functional material may be a composite material. The polymer binder is in contact with the porous matrix and the functional material. At least one of the porous matrix, the functional material, and the polymer binder is configured to serve as an intumescent carbon source. The oxide is configured to catalyze thermal degradation of the intumescent carbon source to form intumescent carbon at a first temperature. The first temperature is greater than or equal to about 300° C. The thermal barrier component is configured to mitigate thermal runaway in an electrochemical cell. The thermal barrier component may include one or more layers.

公开(公告)号：US20230035392A1

公开(公告)日：2023-02-02

申请号：US17390757

申请日：2021-07-30

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng XIAO ,  Mei CAI

IPC: B01J20/30 ,  B01J20/18 ,  H01M10/0525 ,  H01M50/449 ,  H01M50/403 ,  H01M50/443

Abstract: Methods of making functional particles, such as functional lithium ion-exchanged zeolite particles and functional electrode particles for electrochemical cells are provided as well as electrochemical cells including such particles. A method includes combining a solution including (NH4)3PO4 with lithium ion-exchanged zeolite particles to form a first mixture. The method further includes adding a polymeric binder and a lithium salt to the first mixture to form a first slurry including the functional lithium ion-exchanged zeolite particles comprising Li3PO4.

公开(公告)号：US20220166031A1

公开(公告)日：2022-05-26

申请号：US17522331

申请日：2021-11-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Zhe LI ,  Xiaochao QUE ,  Haijing LIU ,  Yong LU ,  Meiyuan WU ,  Thomas A. YERSAK ,  Mei CAI

IPC: H01M4/80

Abstract: The present disclosure provides a solid-state bipolar battery that includes negative and positive electrodes having thicknesses between about 100 μm and about 3000 μm, and a solid-state electrolyte layer disposed between the negative electrode and the positive electrode and having a thickness between about 5 μm and about 100 μm. The first electrode includes a plurality of negative solid-state electroactive particles embedded on or disposed within a first porous material. The second electrode includes plurality of positive solid-state electroactive particles embedded on or disposed within a second porous material that is the same or different from the first porous material. The solid-state bipolar battery includes a first current collector foil disposed on the first porous material, and a second current collector foil disposed on the second porous material. The first and second current collector foils may each have a thickness less than or equal to about 10 μm.

公开(公告)号：US20210218048A1

公开(公告)日：2021-07-15

申请号：US16743699

申请日：2020-01-15

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Fang DAI ,  Hongliang WANG ,  Mahmoud ABD ELHAMID ,  Shuru CHEN ,  Mei CAI

IPC: H01M10/04 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/131 ,  H01M4/136 ,  H01M4/133

Abstract: A battery that cycles lithium ions includes at least one first monopolar electrode having a first polarity and having a first tab and at least one second monopolar electrode having a second polarity opposite to the first polarity and a second tab. The first tab and the second tab are in direct electrical communication with an external circuit. At least one bipolar electrode is disposed between and electrically insulated from the first monopolar electrode and the second monopolar electrode, wherein a first side of the bipolar electrode has the first polarity and a second side of the bipolar electrode has the second polarity. The battery thus comprises at least one first unit cell connected in parallel and at least one second unit cell connected in series.

公开(公告)号：US20210184199A1

公开(公告)日：2021-06-17

申请号：US16711195

申请日：2019-12-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Meinan HE ,  Shuru CHEN ,  Biqiong WANG ,  Mei CAI

IPC: H01M4/04 ,  H01M4/1395 ,  H01M4/38 ,  H01M10/0525

Abstract: A method for preparing an electrochemical cell that cycles lithium ions is provided. The method includes lithiating an electroactive material using a first electrolyte and contacting the lithiated electroactive material and a second electrolyte to form the electrochemical cell. Lithiating the electroactive material includes contacting the electroactive material and a first electrolyte to form a pretreated electroactive material; contacting a lithium source and the pretreated electroactive material; and applying a pressure to the lithium source and the pretreated electroactive material so as to form a lithiated electroactive material. The first electrolyte includes greater than or equal to about 10 wt. % to less than or equal to about 50 wt. % of one or more solvents selected, including for example, fluoroethylene carbonate (FEC). The second electrolyte includes less than or equal to about 5 wt. % of cyclic carbonates and, in certain aspects, one or more electrolyte additives.